[An unusual cause of sensitization against the Rh factor]

A case of Rh-sensitization is reported which was caused by the intra-muscular injection of blood from the patient's husband during the first pregnancy as treatment for hyperemesis gravidarum. The first infant showed a mild erythroblastosis. The second infant suffered of a severe erythroblastosis. The literature is reviewed and the causes of Rhesus sensitization are discussed.